When a developer puts out a Flash game, it can at least be said that they are supporting Flash. But in this instance they are supporting Windows and Mac but not Linux. We have to use the translators dub. Now, it may be a very nice dub with excellent translations and almost complete interchangeability in meaning, but it is still not as nice as actually playing a game in your native language. It is about fairness as much as anything else - other platforms got full support.
This was never a problem for the Humble Bundles before - why make it one now?